I was in an A&E ward the other week and a young man turned up in the bed beside me. I was just mentally gearing up for a discussion about my wellbeing and the law when he started howling about being a werewolf, and they moved me. I could still see that bed which was soon empty. My friend, an astronomer, assured me that the full moon was a few weeks off. If they have to be dealing with that sort of thing often, I'm not surprised they regard trans as harmless.
But the law applies. No exceptions for werewolves, vampires etc - all, oddly, male.